AE SVLD1 User manual

SVLD1 Valve Leakage Detector（AE）
User Manual
QingCheng AE Institute (Guangzhou) Co.,Ltd
www.acousticemission.cn

Quick operation manual
Once used for the first time, firstly connect the sensor with the detector, press
"start" for a long time to enter the main interface of the test, ensure that
the sensor and valve are well coupled during the test。
2.Press “Test” button to do valve leakage detection;
3. Press ”FFT” to view the FFT spectrum of the measured signal;
4. Press ”Back” to switch to current displayed acoustic emission parameters;
5. Press ”Save” to save the current testing datum;
6. Press ”Valve” to switch to the saved valves;
7. Press “Filter” to switch the currently selected filter to the sampling rate；
When no leakage calibration is carried out, press “Test” to get parameters like
RMS、 ASL 、P of the valve , and the current display parameters can be switched
by pressing “PARA”, the reference value of corresponding leakage amount
below is 0
Leakage calibration：
Press “Menu”, firstly add new valve to be calibrated in “valve” option, select
the corresponding valve from the “calibration” options; select the
corresponding filter and sampling rate in the “add” option, add the calibration
curve, and select the corresponding curve in the calibration curve list.
After entering the standard leakage amount, move the cursor to the RMS option,
press the "test" key to generate the current calibration value.
Remarks: The more points there are, the more accurate the reference value of
leakage is.
Announcement
Our company is irresponsible for any results caused by mistaken operation, pls
obey the operation manual strictly; if any abnormal conditions take places during
usage, pls don’t disassemble the machine without permission for maintenance,
and timely contact our company for processing.
For more detailed info, please visit our website: https://www.acousticemission.cn,
or please call at: 86-20-32290092

Catalogue
CHAPTER ONE: INTRODUCTION ...................................................................................................... 1
1.1 TECHNICAL PARAMETERS ....................................................................................................................................... 2
1.2 MAIN CHARACTERISTICS ....................................................................................................................................... 3
1.3 CONFIGURATION LIST ............................................................................................................................................. 4
1.4 CAUTIONS ............................................................................................................................................................... 5
CHAPTER TWO: BRIEF INTRODUCTION OF HOST MACHINE、KEYBOARD AND DISPLAY .... 6
2.1 INTRODUCTION OF THE HOST MACHINE ............................................................................................................... 6
2.2 KEYBOARD INTRODUCTION ................................................................................................................................... 7
2.3 DISPLAY INTRODUCTION ........................................................................................................................................ 9
CHAPTER THREE: MENU AND DISPLAY ........................................................................................ 10
3.1 VALVE ................................................................................................................................................................... 10
3.2 CALIBRATION ....................................................................................................................................................... 11
3.3 SAVE ..................................................................................................................................................................... 12
3.4 SETTING ............................................................................................................................................................... 13
3.4.1 Basic Setting： ....................................................................................................................................... 13
3.4.2 Alarming Setting ................................................................................................................................... 15
CHAPTER FOUR: BRIEF OPERATION INTRODUCTION ................................................................. 16
4.1 VALUE SETTING .................................................................................................................................................... 16
4.2 TEST ...................................................................................................................................................................... 17
4.3 FFT SPECTRUM ANALYSIS .................................................................................................................................. 18
4.4 CALIBRATION ....................................................................................................................................................... 19
CHAPTER FIVE: MAINTENANCE ..................................................................................................... 21
5.1 APPLICATION NOTICE .......................................................................................................................................... 21
5.2 DAILY MAINTENANCE AND SERVICING .............................................................................................................. 21
CHAPTER SIX: FAULT ANALYSIS AND TROUBLESHOOTING ....................................................... 22
CHAPTER SEVEN: PC SOFTWARE ................................................................................................... 23

1
Chapter one: Introduction
Firstly, thank for purchasing our Handheld Valve Leakage Detector (AE). Set up
reference number of the leakage rate through gathering fixed length AE signals,
processing and calculating effective parameters like RMS、ASL、P; at the same
time can demarcate the leakage rate of the detecting device in advance, through
internal calculation to output parameter- the demarcated curve of leakage rate,
thus can output reference values of current leakage rate of the valve while testing。
This instrument applies the principle of acoustic emission technology, easy to
operate、small volume、long working time. Before using it, pls read the operation
carefully. This manual mainly describes its function、technical parameters、
settings、operation、calibration, etc, in order to make customer to know how to
operate it in short time.

2
1.1 Technical parameters
Model No
Parameter SVLD1
Sampling frequency optional 4MHz/2MHz/1MHz/500KHz/200KHz/
100KHz/50KHz/20KHz
Sampling precision 16bit
Response frequency 1kHz-1MHz (±1.5dB)
Protection level Host machine：IP64；sensor：IP66
Channel quantity 1
Working temperature -10℃～50℃
Working humidity 20%～90%RH
Built-in preamplifier 26dB （Sensor）
Analog filter
Six kinds of filters can choose（1KHz-1MHz,
1KHz-600KHz, 20KHz-1MHz, 20KHz-600KHz,
100KHz-1MHz, 100KHz-600KHz）
Power 3VDC(two pieces of AA alkaline battery )
Working time 280 hours（Auto backlight ），100 hours（Backlit
open）
Screen 128×64 lattice LCD
Outside size 136（L）×72（W）×20（H）mm
Weight 176g（including batteries）
Working temperature
-10℃～﹢50℃（high temperature probe，working
temperature：＜300℃）
Working humidity 20%～90%RH
Storage room 50,000 groups testing datum
Valve quantity 200
Generageted parameter RMS，ASL，P

3
1.2 Main Characteristics
 Applying the principles of acoustic emission technology, it is simplified
operation process and easy to be operated. Multiple shortcut keys are set to
complete leak detection with one key;
 Choosing AE time indicators(RMS，ASL,P) as leakage testing parameters,
thus can calibrate the valve leakage rate. Once leakage rate is calibrated, the
detector can display the referential values while testing;
 Obtaining FFT frequency spectrum analysis function, can check FFT
frequency spectrum signals of current testing data at any time；
 Up to 200 kinds of different valves are available, each kind of valve can store
up to 8 calibration curves；
 16 digital sampling precision, sampling frequency can be adjusted based on
the frequency range of leakage signal；
 6 kinds of analog filters can be selected , and can filter the noise signal
according to test condition
 Two pieces of AA dry batteries to supply power, normal endurance time can
achieve 100 hours, it is easy to replace the battery, and is applicable for
long-time working outside, small volume，low weight, easy to carry；
 Two kinds of alarming modes： beeping and flashing alarm, can set up two
kinds of alarm limits: first level and second level, alarming data can be saved
automatically；
 Datum storage：Storage shortcuts are set up, can finish datum storage by
one button, can track and record time、date simultaneously，datum storage
volume can achieve 50,000 groups；
 Communication interface： high speed of USB interface which can export
the datum, also can processes datum on the master computer.
 Working way: can offer testing of valve AE parameters and valve AE leakage
rate( which are under demarcated condition)；
 Daily AE valve leakage detecting can be done through operating the
functional button, easy to see and to learn, no need to operate it by entering
menu.

4
1.3 Configuration list
NO Model Name Unit Quantity
1 SVLD1 Machine set 1
2 Plastic box piece 1
3
AE Sensor LS35
5VDC, with coaxial
cable
piece 1
4 Mini-USB cable piece 1
5 PC software Set 1
6 User Manual piece 1
7 Warranty Card piece 1
8 Conformity Card piece 1

5
1.4 Cautions
◇ In order to make sure safe operation, the person who use this instrument
should know related NDT Knowledge firstly;
◇ This instrument should be used under permissive condition, especially
cannot be used in strong magnetic field and under strong corrosive
environment;
◇ During the operating process, please obey the instruction to use correctly,
make sure safe operation, thus to avoid unnecessary loss;
◇ During testing process, if the instrument indicates that the power is too low,
please replace the battery in time to avoid the measurement error caused by
the voltage is too low;
◇ If the device is not used for a long time, the battery should be taken out and
placed separately, in order to prevent battery leakage damage to the device;
◇ Please contact us if there is any fault, do not disassemble and repair by
yourself.

6
Chapter Two: Brief Introduction of Host Machine、Keyboard and Display
2.1 Introduction of the host machine
Picture 2-1: SVLD 1 Valve Leakage Detector (AE) host machine
Picture 2-2: Sensor Sketch Map

7
2.2 Keyboard introduction
The keyboard of the leak detector is shown in picture 2-3。
Picture 2-3：Keyboard Sketch Map
Keyboard Introduction:
：”On and off”， press it for 2 seconds to turn the instrument on, at the same
time it performs the self-inspection; once under the testing condition, press it for
2 seconds to turn off the instrument. Press this button only for short time, turn on
or off the screen backlight
：Under the test interface, press this key to quickly switch and select the
gate. Press this key in the menu interface to select or change values up。
：press the key to enter the menu list, in the menu list can do setting、